Improvement in flour and middlings purifiers



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A. m. cordsrucx. Flour and MiddlingsPurifier. N0.I67,5 02.

Patented Sept. 7,1875.

WITNESSES 95% fl /1465.

ATTORNEYS N. PETERS, PHOTO-LIYHOGRAPNER, WASHINGTON. n c.

2Sheets--Sheet2. A. M. COMSTOGK. Flour and Middlings Purifier.N0.l67,502.

Patented Sept. 7,1875.

I IIWITNESSES ATTORNEYS AUSTIN M. OOMSTOGK, OF BATTLE GREEK, MICHIGAN.

IMPROVEMENT IN FLOUR AND MIDDLINGS PURIFIERS.

Specification forming part of Letters Patent No. 167,502, datedSeptember 7, 1875; application filed February 24, 1875.

To all whom it may concern:

Be it known that I, AUSTIN M. OoMsrocK, of the city of Battle Creek, inthe county of Calhoun and in the State of Michigan, have inventedcertain new and useful Improvements in Flour Bolts and Separators; anddo hereby declare that the following is a-full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, making a part of thisspecification.

The nature of my invention consists in cupshaped troughs or elevatorsrunning lengthwise of and attached to the periphery of each rib of thereel, whereby the product is delivered through suitable openings into acham; her or chambers situated parallel with the bolt-chamber, and a fanfor creating air'currents through the chamber or chambers. Also, incombining the bolt and its troughs and the opening with the chamber orchambers, having a series of inclined shelves and regulated air-currentsso arranged with reference to each other and to the descending productthat the latter is deflected from one toward the opposite side of thechamber, and vice versa, while the ascending counter-current of air isalso deflected, but in an opposite direction, the current of the onecrossing the course of the other at each and every shelf, thuseliminating the lighter from the denser portions of the product, thelatter falling down, by reason of its greater gravity, to the bottom,and passing out of the chamber into the well-known conveyer providedunderneath, while the lighter portions pass upward with the air throughopenings into a chamber on top, where any valuable portion stillremaining, gradually settling down to the bottom of this chamber, passesout into a conveyer there provided. Also, in the combination of the boltand its troughs with the two chambers, their respective conveyors, and afan for creating air-currents. Also, in a vacuum-chamber, from which airis drawn for the purpose of creating an air-current for purifyingmiddlings, with a flour-bolt and purifying-chambers, in combination withthe bolt having troughs and chambers, as hereinafter described, so thatthe strength of the current of air in each sub-chamber may be governedat will, independently of the others, by means of apertures for theingress and egress of air, regulated by suitable slides.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawings, in which-Figure 1 is a perspective View of my flourbolt partly broken open toshow the interior. Fig. 2 is a transverse vertical section of the same.

A represents the ordinary flour-bolt, revolving in the chamber B, andprovided with troughs O 0 attached to the ribs of the reel, and runningthe entire length thereof. D represents a chamber situated'parallel withthe bolt-chamber, and communicating therewith by openings to. Thischamber is divided by vertical partitions D into sub-chamberscorresponding with the different numbers of cloth on the reel. In eachof these sub-chambers is a series of inclined shelves, E, attached on0pposite sides alternately, as shown in Fig. 2. Under each shelf E is anair-inlet, b, and on the opposite side above the shelves are airoutletsd, which latter communicate with a chamber, G- Above the chamber G is avacuum-chamber, H, communicating therewith by openings 6, which, in afull-sized machine, are to be regulated by suitable slides.

The operation of my flour-bolt is as follows: The product passes throughthe meshes of the cloth composing the bolt-screen, and is caught up bythe longitudinal troughs 0 O and projected through the openings to ainto the sub-chambers D D, where it falls upon, and passes over, theinclined alternate shelvesv E E, taking a zigzag direction. In itsdescent it is met by a counter-current of ascending air pursuing asimilar path, but in an opposite direction, the two opposing currents ofthe product and air crossing each other at each and every shelf, and inthis simple manner eliminating the coarser and lighter portions from thefiner and denser. The latter pass down to the bottom of the chambers Dand out of suitable openings into the ordinary conveyer I underneath,while the former pass upward and are carried over into the chamber Gthrough the openings d cl, where any valuable portion yet remaininggradually settles to the bottom of said chamber, when that also issecured by means of a trap-door, J, and the usual con- Veyer, K, thereprovided. The air-current is induced by means of a suitable fan-wheel,L, which, as it rapidly revolves, exhausts the air from thevacuum-chamber H, and as the openings 6 are to be provided with suitableslides the strength and velocity of the aircurrent in each sub-chambermay be regulated independently of the others.

These sub-chambers are in number the same as the number of sections ofthe bolt-containing cloth of different degrees of texture, correspondingwith the grades of product.

Having thus fully described my invention, What I claim as new, anddesire to secure by Letters Patent, is

1. The combination of the bolt A, provided with an exterior cup-shapedtrough, C, on each longitudinal rib, the opening a, the chamber orchambers D, and a fan for creating air-currentsthrough said chamber orchambers, all substantially as set forth.

2. The combination of the bolt A, having conveyers I K, vacuum-chamberH, and fan L,

all constructed and arranged to operate substantially as and for thepurposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this22d day oi January, 1875.

- AUSTIN M. OOHSTOCK. Witnesses:

JABEZ L. HAYWARD, TOLMAN W. HALL.

